mcintyre



(No Model.) 2 sheets-Sheet 1.

J. W. MOINTYRE.

VISE.

No. 544,683. Patented Aug. 20, 1895.

(N0 Model.) 2 Sheets-Sheet 2.

J. W. MOINTYRE. VISE.

No. 544,683. Patented Aug."20,'1895.

UNITED STATES PATENT OFFICE.

JOHN IV. MCINTYRE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO CHARLES E. TAYLOR AND JOHN EOHTERNOCH, OF

SAME PLACE.

VISE.

SPECIFICATION forming part of Letters Patent No. 544,683, dated August20, 1895.

Application filed September 29, 1894. Serial No. 524,472.

To aZZ whom it may concern.-

Be it known that 1, JOHN W. MCINTYRE, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inVises, of which the following is a specification, reference being hadtherein to the accompanying drawings.

My invention relates to certain improvements in bench-Vises, and has forits object to provide a form of vise in which the clampingjaws may bequickly and readily adjusted toward and from each other and then clampedupon the work, as more fully set forth hereinafter.

In the accompanying drawings, Figure 1 is a longitudinal sectionalelevation of a vise constructed in accordance with my invention. Fig. 2is a transverse sectional elevation of a portion of the same on the line2 2, Fig. 1. Fig. 3 is a perspective of the locking-nut detached fromthe vise. Fig. 4 is a longitudinal sectional elevation of aslightly-modified construction of vise; and Fig. 5 is a transversesectional elevation on the line 5 5, Fig. 4:.

Referring to Figs. 1 and 2 of the drawings, A represents the fixed jawsecured at the front of the frame B of the vise. The rear jaw O is ofthe usual form, and its lower portion is provided with aninverted-T-shaped bar 0, adapted to guides a, provided upon the upperedges of the sides of the frame. This rear jaw is movable in its guidestoward and from the fixed forward jaw, but has no vertical movement,owing to the construction of the guides and the T-shaped bar a, as shownin Fig. 2.

Mounted on a pivot-pin d, within the side walls of the frame B, is athree-armed lever E, having one vertical arm e, passing through theslotted rear end of the bar 0, and two horizontal arms 6 6 connected bybars h to a weighted pedal-lever H, the fulcrum-pin z' of thepedal-lever being between the points of connection of the bars h. On oneend of the pedal-lever is a weight H, tending to pull the arm a of thelever E in a downward direction and to effect the rearward movement ofthe jaw C, the arm a of the lever acting on a transverse pin 0, carriedby the slotted bar 0, when (No model.)

moving the jaw to the rear, while in closing the jaws the depression ofthe pedal causes the arm 9 of the lever to act on the inclined rear faceof the jaw.

Mounted in the jaw A is ascrew-rod L, having, as usual, a slidingoperating-handle L. The rear end of the screw has a portion of itsthreads removed in such manner as to make two fiat faces on oppositesides of the rod, as shown in Fig. 2. This screw passes freely throughthe rear jaw O and does not engage with the same.

To the forward face of the jaw G is secured by screws m m a nut N,having the upper and lower portions of its central orifice nthreaded toengage with the threads of the screw L, while the side walls arerecessed, as at n, so that when the screw L is turned to the positionshown in Fig. 2 the nut and the jaw to which it is secured may be freelymoved to and fro by means of the pedal, and when the jaws are so movedas to clamp the work between them a quarter-turn of the screw is allthat is necessary to lock the jaws firmly upon the work, the pitch ofthe threads acting, moreover, to tighten the jaws upon the work. Thisnut N is made of steel and will stand considerable wear, while the jawsmay be made of softer cast metal. The nut, being secured in position bythe screws m, takes all the wear and may be replaced from time to timeas it is worn away.

A modification of my invention is illustrated in Figs. 4 and 5. In thisstructure the rear jaw O is fixed to or formed integral with the frame,while the front jaw A is movable to and fro in this case by a two-armedlever E, connected bya single bar to a pedal-lever of any approvedconstruction. The movable jaw A carries a nut N,such as that shown inFig. 3, and the rear fixed jaw carries an ordinary nut O. The screw L inthis instance is flattened for a portion of its length where it engageswith the nut N; but its rear end Z is cylindrical and is provided with aright-hand thread running in a direction opposite to the threads on thehandled end, so that as the two threads are engaged the turning of thescrew will act to greater advantage in clamping the jaws upon the work.

The vise described may be rapidly operated by means of the treadle, andin some classes of small work the screw L need not be employed totighten the jaws, the operator keeping them clamped upon the work byexerting constant pressure upon the pedal.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is-

1. The combination in a vise, of a fixed jaw, a frame carrying the same,a movable jaw, a flattened screw, a recessed nut carried by said movablejaw and engaging said screw, and means independent of said screw formoving said jaw substantially as specified.

2. The combination in a vise of a fixed jaw, a frame carrying the same,a movable jaw, a flattened screw, a recessed nut removably secured tosaid movable jaw and engaging said screw, and means independent of saidscrew for moving said jaw substantially as specified.

3. The combination of the fixed jaw, a frame carrying the same,a movablejaw, a flattened screw, a recessed nut carried by the movable jaw forsaid screw, and means for moving said movable jaw independent of thescrew, comprising a pivoted treadle and a lever pivoted to the fixedframe and having one arm engaging with said movable jaw and another armconnected to the treadle, substantially as specified.

4. The combination in a vise of the fixed jaw, a frame carrying thesame, a movable jaw, a flattened screw having right and left handthreaded portions, a nut carried by the fixed jaw and engaging thecylindrical portion of the screw, and a recessed nut carried by themovable jaw and engaging the flattened portion of the screw,substantially as specified.

In testimony whereof I affix my signature in the presence of twowitnesses.

JOHN XV. MCINTYRE.

Witnesses:

O. E. TAYLOR, A. D. LAUER.

